Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 41,193	$ 32,672
Investment securities	254,929	301,753
Prepaid expenses and other current assets	9,281	10,759
Total current assets	305,403	345,184
Property and equipment, net	3,266	3,500
Operating lease right-of-use asset	1,371	1,486
Derivative asset	668	668
Restricted cash	1,301	1,301
Other assets	2,000	37
Total assets	314,009	352,176
Current liabilities:
Accounts payable and accrued expenses	16,296	15,351
Accrued compensation and related expenses	6,825	9,081
Deferred revenue	2,121	2,240
Operating lease liability	1,079	1,051
Total current liabilities	26,321	27,723
Operating lease liability, non-current	1,743	2,024
Deferred revenue, non-current	5,615	6,101
Total liabilities	33,679	35,848
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.001 par; 10,000 shares authorized; no shares issued or outstanding at September 30, 2022 or at December 31, 2021	0	0
Common stock and paid-in capital, $0.001 par; 200,000 shares authorized; 53,796 shares issued and outstanding at September 30, 2022; 47,598 shares issued and 47,597 shares outstanding at December 31, 2021	768,012	759,432
Accumulated other comprehensive loss	(2,514)	(3,931)
Accumulated deficit	(485,168)	(439,173)
Total stockholders’ equity	280,330	316,328
Total liabilities and stockholders’ equity	$ 314,009	$ 352,176